Gas-pump.



A. s. WHITE. GAS PUMP. APPLICATION FILED DBO. 11,1909.

Wit T065566 [fiver M507 w a B I ALFRED S. VVI-II'IE, OF CHICAGO, ILLINOIS.

Specification of Letters Patent.

Application filed December 11, 1909. Serial No. SEJLtl t.

To all whom it may concern:

Be it. known that I, ALFRED S. WHITE, a citizen of the United States, residing at Chicago, in the county of Cook andv State of Illinois, have invented a certain new and useful Improvement in Gas-Pumps, of which I the following is a full, clear, concise, and

exact description, reference being had to the accompanying drawings, forming a part of this specification;

I My invention relates to gas pumps. and has particular reference to the oiling system used inconnection with such pumps.

- The type of pump to which my invention relates is 'usedla-rgely for pumping ammonia gas in connection with refrigerating operations. It is necessary that the bearings of such pumps should .bethoroughly lubricated, and in order to effect this result it has been customary that a crank chamber should be provided, in which a considerable amount of oil is contained. On each revolution of the crank shaft the bearing between the crank and the connecting rod of the piston dips into the oil, and thorough lubrication is obtained.

It has been found that the oil in the crank chamber becomes heated to a considerable extent, and the result of this is that as the crank dips into "the oil, a certain amount This foaming in sults are obtained .by the use of such heated oil as a lubricant than would be obtained-by the use of cold oil. It'has also beenfound that in the case of ammonia and'other gas pumps, a certain amount of oil inevitably passes by the piston which reciprocates' within the, cylinder, and this oil is mixed with the gas which is being pumped? It has been customary to provide a trap in the discharge pipe in order to collect thisoil. A pipe has been used leading directly from this trap to the crank chamber, thereby retuniing the oil directly to the same. By

this construction, however, the oil is not allowed to become cooled, and the foaming anduse of hot oil mentioned above has been the inevitable result. At the same time, a certain amount of gas passes the piston, and

.for this reason it is necessary to have a closed crank chamber.

Moreover, on account of the pungency of ammonia gas, all chambers or receptacles communlcatmg \Vltll the crank chamber must becut off from com- 1 munication with the atmosphere.

According to my invention, the oil which is collected in the trap isdrawn oii periodically into a reservoir of considerable size which is in 'direct communication with the crank chamber, the oil in the reservoir and the crank chamber being at the same height.

The :connection between the reservoir and crarikchainber is sufficiently above the'bottom of the former so that any sediment which may pass from the trap into the reservoir does not pass into the crank chamber. This is a point of great. superiority, inasmuch as by the old construction, where a pipe led directly from the trap to the crank chamber all the sediment passed directly into said chamber. An outlet is provided in connection with the reservoir so that-the sediment collecting in the same may be withdrawn from time totim'e, as necessary. These and other advantages of my invention will be more apparent by reference to the accompanying drawing, which is an elevation and partly sectional view of the pump and its associated parts.

The pump 1 is mounted on the supports 2. XVithin the framework of the pump is provided a closed crank chamber 3, within whichthe crank shaft 4 is adapted to operate. -The crank shaft at is provided with the crank 5,-towhioh is attached, bysuitable bearings, the connecting rod6, the other end of which is connected to the piston 7 operating withinthecylinder 8. The upper portion of, piston 7 is provided with the packingrings 9 in order to prevent,as far 'as possible, communication between the portions of cylinder 8 above andbelow the piston 7 The cylinder 8 is surrounded at its upper portion by the water jacket 8*, which serves to keep the gas which'is being forced through the pump at a comparatively low temperature.

A suction pipe 10. communicates with a source of gas, for example, ammonia, which -is to be pumped. In this suction pipe is provided a valve 11 for controlling the supply of gas. The suction pipe 10 communiwith which cylinder Sis integral.

A passage 13 is provided within the cylcates with passage 12 within the casing Patented Dec. 6, 1910.

8, this opening being closed by the valve 16, which is beveled and fits a corresponding bevel in opening A valve stem 17 passes upwardly through the upper wall of cylinder head 14, and on its end is provided witha nut 18. A spring 19 incloses the valve stem 7 and has its bearing on one end against the cylinder head 14... A bracket 23 is head Y14, and cups 24 and 25 covering the upper surface of the cylinder head 14, and

.on the other end against the nut 18 on the 10 end of valve stem 17. Also communicating with the upper part of the cylinder 8 is theopening 20, which is closed by valve 21, the

beveled edge of this valve being placed oppositely to thebeveled edge of valve 16, mentioned above. The valve stem 22 passes upwardly through the upper wall of the mounted on the cylinder upper ends of valve stems l7 and 22 "respectivel'y are held in position against the gaskets in the annular grooves of the cylinder head 14 by means of set screws 26 passing through the bracket 23; On the inside of on 25 is provided a boss 27. 'On the end ot valve stem 22 a plunger 28 is mounted, this plunger being ada ted to operate within a hole in the boss 2 A spring 29 bears on one end against the boss 27, andon its other end against the upper wall of .the cylinder head 14.

- Communicating with opening 19. is the passage 30 within the cylinder head 14.

This passage communicates. with a discharge passage 31 within the casing with which the cylinder head is integral. A discharge pipe 32 communicates with passage 31, the valve 33 being provided to re ulate the discharge of gas, and being simi ar tovalve '11 described above. l ischarge pipe 32 passes into the .trap 34, asnindicated by the dotted lines, the pipe 35, also incommunication with trap 34, serving to carry away the gas which is forced into the' trap 34. The bottom-of trap 34 is closed by the horizontal partition 36, below which is the oil reservoir 37 mounted on base 38. A pipe 39, provided with a valve 40, serves to establish communicationbetween trap 34 and reservoir 37. A pipe 41 provided with valve 42 establishes communication between reservoir 37 and the bottom of crank'chamber 3. The reservoir 37 is provided with a gage 43 in order to -in-. dicate the height of oil within the reservoir 37 Near the bottom of reservoir 37 is a discharge pipe 44 provided with a valve 45.

' The pipe 46, provided with valve 47, aflords communication between the upper parts oiher 3 past the piston 7 and is carried throng connecting rod 6 di into the oil within the,

crank chamber 3, an

lubrication of the bearing is thus effected. As the piston 7 travels V i in a downward direction, provided the valves I 11 and 33 are open, the gas is drawn through suction pipe 10 and assage 12 into passage.

13. The suction is t en efi'ective inlunseating the valve 16, and the gas passes into"tlie" portion of the cylinder 8 which is above the piston 7. As the pistontravels upwardly,

the valve 16 is seated and valve 21 -is.'1'1n.- seated, the gas thus being allowed to; ass

from the cylinder 8'into passage 30, and t en throu h passage 31. into the 'd'ischargeipipe,

32. thas been found that a' certainam'og' of olllnevitably passes from the crank chain the passages-and discharge pipe 32 with the gas. This oil is separatedfrom the gas in the trap 34-and collects in the bottom of the trap above the partition 36. The gas then passes outwardly through pipe 35. When the pump is started, a suitable amount of oil is provided in reservoir 37 aridcrankchamher 3, valve '42 beingopen and thus provid-' ing free communication between the chamber and the reservoir, the levelof oilin both of V these thereby being the same. As oil collects in the bottom-of trap 34, this is periodically transferred to reservoir 37 by' opening .the'

valve 40, the sediment from the trap 34\being'.

thereby carried into reservoir 37. The volume of oil in reservoir 37 is considerable; and for this reason it is-possible to maintain the oil at a comparatively lowtemperature.- When it iside'sired to withdrawthesediment fromreservoir. 37, valve,45 iILPiPe..44is

opened and the sediment passesthrough this pipe. v

In order to prevent the pressure'imthe crank chamber 3 from,becomingexcessive,..

pipe 46. is provided and the valve slight-1y opened in order to equalize the pres: sure in the crank chamber 3 and the. reservoir 37 Inasmuch as the pressurein, the crank chamber 3v and reservoir 37 is always..,th

same, it 'follows.that the level of oil. the' chamberand reservoir will also be thesame.

Pipe. 48, which connects. with the suction,

pipe 10, is used for reducing the pre'ssurein. the reservoir 37 .and also in the crank chamj her 3. The valve 49 is also allowed toire; main slightly open. The reduction in. pressure takes place by withdrawing the gases from the reservoir 37 and crank chamber 3 through the pipe. 48, and after these gases pass intothe suction p'pe 10 they again sub sequently pass through the pum It'is-evidentfromthe above description that my invention possesses. many advantages, prominent among .Whicharethe withdrawal of-t-he, sediment from the oil bymeansof producing a'suitable outlet in reservoir 37 and thereby tamination-of the oil within crank chamber reventing, the con 3. By means of my invention it isalso pos-' sible to keep the oil cool and thus prevent I foaming.

\VhatI claim as new and desireto cover by United States Letters Patent 1s 1. In aj-gas pump, the combination-of a lubricating chamber adapted to contain oil, adischarge, pipe, a trap n saldplpe for separating oil from the gas carried through a said dlscharge pipe, an voll reservoir, means connecting said reservoir with said trap,

and means connecting said reservoir with said lubricatingchamber.

2. In a gas pump, the combinationof a lubricating chamber adapted to contain oil,

a discharge pipe, a trap in said pipe for separating oil from the gas carried through said discharge'pipe, an oil reservoir, means connecting said reservoir with said trap,

means 'connecting'said reservoir with said lubricating chamber, and an outlet from said reservoirfer drawing ofl' sediment from theoil. H I

. 3. Ina gas pump,.the combination of a lubricating chamber adapted to contain oil, a discharge pipe, a trap in said pipe for separating oil from the gas carried through said discharge pipe, an oil reservoir, means connecting said reservoir with said trap,

means connecting said reservoir with said lubricating chamber, and means for equalizing the pressure in vthe reservoir and the llubricatln'g chamber.

4. In a gas pump, the combination of a suction pipe, a discharge pipe, a trap in said discharge pipe forjseparating oil from the gas discharged from the, pump, an oil reservoir, 'means connecting said trap with said reservoir, a lubricating chamber, means connecting the reservo1r w th the lubricating chamber, and means connecting the reservoir with the suction pipe for decreasing the pressure in said reservoir. i

5. In a gas pump, the combination of a suctioirpipe, a discharge pipe, .a trap in said discharge pipe for separating oil from the gas discharged from the-pump, an oil reservoir, means connecting said trap with said reservoir, a lubricating chamber, means connecting the reservoirwit-h the lubricating chamber, means connecting the reservoir with the suction ,pipe for decreasing the pressure-in said reservoir, and an outlet in the bottom of said reservoir" for separating the sediment from said oil.

'7. In a gas pump, the combination ofa suction pipe, a discharge pipe, a tra in said discharge pipe for separating oil rom the rgas passing through said pump, an oil reservoir, means connecting said trap with said oil reservoir, a closed lubricating cham- 1 -,ber.- means for connecting said reservoir with said lubricating chamber to allow the free passage of oil, means connecting the upper, parts of the reservoir and the lubrieating chamber to allow equalization of pressure, thereby causing thetoil in the reser- "voir and lubricating chamber to be at the same level, and means connecting the upper.

part of reservoir with tlieisu'ct-lon pipe, thereby decreasing the pressure in the'jreser gas to the suction 'p'ipel I ,',,8. Inv a gas pump, 'tlief combination of a suction pipe, a discharge pipe, a trap in said discharge pipe for separating oil from the ,VOII" and lubricating;gfchainber and returning gas, passing through said pump, an oil reser voir, means connecting said trap with said 011 reservo1r,'a closed lubrlcating chamber, means tor connecting sald reservoir wlth said lubricating chamber to allow the free passage ofoil, means connecting the upper parts of the reservoir and the lubricating chamber to allow equalization of pressure,

thereby'acausing the oil in the reservoir and lubricating chamber'to be at the same level, means connecting the upper part of said reservoirwith the suction pipe, thereby decreasing the pressure in the reservoir and lubricating chamber and returning gas to the suction pipe, and means for separating the sediment from the oil in said reservoir, thereby preventing the return of said sediment to the lubricating chamber.

9. In an ammonia pump, the combination of a cylinder, a piston adapted to IBCiJIO- cate within said cylinder, a crank sha 't, a connecting rod from said crank shaft to said piston, a closed crankchamber adapted to contain oil for lubricating the bearing be-, tween said connecting rod and the crank on said crank shaft, a suction pipe, a discharge pipe, a trap in said discharge pipe for separating the oil from the ammonia, an oil reservoir, means" connecting said trap with said reservoir to allow the periodic passage of oil therethrough, means connecting the reservoir with the crank chamber to allow the passage of oil, means connecting the upper portions of the reservoir and crank chamber to efi'ect an equalization of pressure, thereby causing the oil in the reservoir and crank chamber to assume the same level, means connecting the upper portion of said reservoir with the suction pipe to cause a reduction in pressure in the reservoir and crank chamber, and means for separating the sediment from the 011 in said reservoir.

10. In a gas pump, the combination of an inclosedcrank chamber adapted to 'contain oil, a separate oil reservoir connected with said crank chamber below the level of the oil, and a pressure-equalizing passage agas supply pipe, a pressure-relievin pas-' sage between the gas supply pipe an said. reservoir, and a pressure-relieving assage between the crank chamber and sai reservoir.

'12. In a gas pump, the combination of the bottomof said crank chamber to a I above the bottom of sald oil reservoir, a

pressure-equalizin an inclosed crank chamber adapted to contam 011, an 011 reservolr, a connectlon from connection between said crank chamber an said reservolr above the level 'of the o l, and a connection from the 1 upper portion of the oil reservoir to the gas-sup 1y pipe of the um In witnesswhereof, her eunto subscribe my name this 8th day of December, A. D.

Witnesses: I HENRY M. UXLEY, J.-S.-ABB0T1 point 2o ALFRED. s. WHITE. A y 

